Overview Of The A/D Converter - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 15 A/D CONVERTER

15.1 Overview of the A/D Converter

The A/D converter converts analog input voltage into a digital value.
■ Overview of the A/D Converter
The A/D converter has the following features:
❍ Conversion time
Minimum 26.3µs per channel
❍ Sampling time
Either 64 machine cycles or 4096 machine cycles (minimum 4µs or 256µs) per channel can be
selected.
Note that these conversion and sampling times are applied when the machine clock is set at
16 MHz.
❍ Compare time
Either 176 or 352 machine cycles per channel.
Note that 176 machine cycles are used at machine clock 8 MHz or smaller.
❍ Adoption of RC type successive approximation conversion method with a sample and
hold circuit.
❍ Resolution of 8 or 10 bits
❍ Analog input can be selected from eight channels by a program.
❍ Single conversion mode
One channel can be selected and converted.
❍ Scan conversion mode
Successive multiple channels can be converted. Up to eight channels can be programmed.
❍ Successive conversion mode
Specified channels are repeatedly converted.
❍ Pause conversion mode
After conversion of a channel, pauses and waits for the next activation (enables synchronous
conversion of conversion)
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